/*
* Copyright (C) [2004, 2005, 2006], Hyperic, Inc.
* This file is part of SIGAR.
*
* SIGAR is free software; you can redistribute it and/or modify
* it under the terms version 2 of the GNU General Public License as
* published by the Free Software Foundation. This program is distributed
* in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
* even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA.
*/
package org.hyperic.sigar.cmd;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.Reader;
import java.util.ArrayList;
import java.util.List;
import org.hyperic.sigar.Sigar;
import org.hyperic.sigar.SigarException;
import org.hyperic.sigar.FileInfo;
import org.hyperic.sigar.FileTail;
import org.hyperic.sigar.FileWatcherThread;
/**
* Display the last part of files to the standard output.
*/
public class Tail {
public boolean follow;
public int number = 10;
public List files = new ArrayList();
public void parseArgs(String args[]) throws SigarException {
for (int i=0; i<args.length; i++) {
String arg = args[i];
if (arg.charAt(0) != '-') {
this.files.add(arg);
continue;
}
arg = arg.substring(1);
if (arg.equals("f")) {
this.follow = true;
}
else if (Character.isDigit(arg.charAt(0))) {
this.number = Integer.parseInt(arg);
}
else {
throw new SigarException("Unknown argument: " + args[i]);
}
}
}
public static void main(String[] args) throws SigarException {
Sigar sigar = new Sigar();
FileWatcherThread watcherThread =
FileWatcherThread.getInstance();
watcherThread.doStart();
watcherThread.setInterval(1000);
FileTail watcher =
new FileTail(sigar) {
public void tail(FileInfo info, Reader reader) {
String line;
BufferedReader buffer =
new BufferedReader(reader);
if (getFiles().size() > 1) {
System.out.println("==> " +
info.getName() +
" <==");
}
try {
while ((line = buffer.readLine()) != null) {
System.out.println(line);
}
} catch (IOException e) {
System.out.println(e);
}
}
};
for (int i=0; i<args.length; i++) {
watcher.add(args[i]);
}
watcherThread.add(watcher);
try {
System.in.read();
} catch (IOException e) { }
watcherThread.doStop();
}
}